I'm sure there's going to be times when you get to hide in the shadows and grab people from behind, etc. But from what I've seen the game looks more like Hitman... which is a bad thing, not because I don't like Hitman, but because I play Splintercell to play... Splintercell.
I think it's like Bloodmoney, except you can sneak around more easily, with the option of shadows and gadgets, etc. But that they're going to force you to be in the crowd situations, and more of the Hitman style gameplay =/
I really liked Splintercell because unlike Metal Gear Solid (Which I really didn't get into...) it was more fluid and felt more real to me, unlike the camoflauge (sp) and whatnot. Also unlike Hitman, it wasn't based on a certain story strategy, and events. It was based more on raw actions and it felt more like I can be sucessful with my skills and not with a strategy guide.
I really hope that I'm wrong about Convictions, and I'll still probably buy the game just in case, but I really hope that it's not going to be a Hitman styled game.